Add build status images to README

Travis build images for master and develop
Migrate to 2.8 #2356

Task ID: 2356

Review ID: 394001
Merge pull request #5 from Abhisar/feature/task-2356

Migrated to 2.8  #2356
Bump version to 2.8.0.1
Merge branch 'release/2.8.0.1'